#sensor
sensor circuits ready to build, each with a parts list, a schematic and a picture showing how to connect it. Want to change something? Make your own copy in one click.
Newest circuits
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Bird Feeder Detector
Do you want to know when there's a bird in your bird feeder? There's a circuit for that! This uses a PIR motion sensor that works with infrared light. And it…
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Op-Amp Circuit: Thermostat Fan
This is an op-amp circuit that turns on a fan when the temperature goes above a certain threshold. The threshold can be adjusted with a potentiometer.
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Simple Water Sensor
This project is a a very simple water-leak detector. Place two exposed wires on the floor near your washing machine or some other place where you want to…
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Automatic Night Lamp
This is an automatic night lamp. The lamp turns on automatically at night. Tweak the value of R2 (or replace with a potentiometer) to adjust the amount of…
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Simple Rain Detector
This project is a a very simple rain detector. When a drop of water hits the rain sensor board overlapping two neighboring strips, they create a bridge where…
